PREFIX xsd: PREFIX snvoc: PREFIX sn: PREFIX dbpedia-owl: PREFIX dbpedia: PREFIX foaf: PREFIX rdfs: select ?first ?last ?startdate ?orgname ?fr #Q11 where { ?w snvoc:hasOrganisation ?org . ?org foaf:name ?orgname . ?org snvoc:isLocatedIn ?country. ?country foaf:name 'Panama' . ?fr snvoc:workAt ?w . ?w snvoc:workFrom ?startdate . filter (?startdate < 2007) . { select distinct ?fr where { {sn:pers00000006597069777199 snvoc:knows ?fr.} union {sn:pers00000006597069777199 snvoc:knows ?fr2. ?fr2 snvoc:knows ?fr. filter (?fr != sn:pers00000006597069777199)} } } . optional { ?fr snvoc:firstName ?first } . optional { ?fr snvoc:lastName ?last } . } order by ?startdate ?fr desc(?orgname) limit 10